The Co:Writer Chrome Extension will now highlight words as you type. This setting is controlled by your Speak Letters, Words, or Sentence setting on the Co:Writer options page.*
Speak letters: Each letter will be highlighted after you type it.
Speak words: Each Word will be highlighted after you select it or enter a space between words.
Speak sentences: Each word in the sentence will be highlighted while it is being read to you after you enter in the punctuation at the end of the sentence.
*Highlighting currently is not available in Word online.